Free Math & Statistics Calculators

ANOVA Calculator Run one-way ANOVA on three or more groups and read the complete results table. APA Citation Generator Generate a correctly formatted APA 7th edition reference and in-text citation. Absolute Value Equation Calculator Solve absolute value equations and see both branches, or why there is no solution. Adding Fractions Calculator Add two or three fractions or mixed numbers with every step of the working shown. Arc Length Calculator Enter a radius and central angle in degrees or radians to get the exact arc length. Arccos Calculator Find the angle whose cosine is a given value, including obtuse results. Arcsin Calculator Find the angle whose sine is a given value, with exact results and domain checks. Arctan Calculator Find the angle whose tangent is any real number, plus two-argument atan2. Arithmetic Sequence Calculator Find any term of an arithmetic sequence, the sum of its terms, and where a value sits in it. Binomial Coefficient Calculator Compute n choose k with exact whole-number arithmetic, plus permutations and symmetry. Binomial Distribution Calculator Find the exact binomial probability of k successes plus both cumulative tail values. CGPA Calculator Calculate your cumulative GPA across multiple semesters and convert CGPA to a percentage. Chi-Square Calculator Test a contingency table for independence or compare observed counts with expected ones. Circle Calculator Enter any one measurement of a circle and get the radius, diameter, circumference and area. Coefficient of Variation Calculator Work out the coefficient of variation to compare spread across different units or scales. Completing the Square Calculator Turn a quadratic into vertex form and see every line of the working written out. Complex Number Calculator Add, subtract, multiply or divide complex numbers with modulus and polar form shown. Cone Calculator Cone volume, slant height, lateral area and total surface area from radius or diameter. Confidence Interval Calculator Build a confidence interval for a mean or proportion with exact t and z critical values. Correlation Coefficient Calculator Calculate Pearson r and Spearman rho from paired data, with r-squared and a p-value. Coterminal Angle Calculator Find every angle sharing a terminal side, positive and negative, in either unit. Covariance Calculator Calculate sample and population covariance from paired data, with the working shown. Cross Multiplication Calculator Find the missing term in any proportion, with the cross-multiplied working shown. Cube Calculator Find cube volume, surface area and both diagonals from an edge, volume or diagonal. Cube Root Calculator Find the real cube root of any number, negatives included, with the simplified exact form shown. Cubic Equation Calculator Solve any cubic equation and see all three roots with the depressed cubic working shown. Cylinder Volume Calculator Find the volume, capacity and surface area of a cylinder from its diameter or radius and height. Decimal to Fraction Calculator Convert terminating and repeating decimals into exact fractions with the algebra shown. Digit Sum Calculator Add the digits of any number, reduce it to its digital root, and test divisibility. Discriminant Calculator Find the discriminant of a quadratic and read off the exact nature of its roots. Dividing Fractions Calculator Divide fractions and mixed numbers and see the reciprocal step that makes it work. Double Angle Calculator Apply the double angle identities and compare all three forms of cos 2 theta. Ellipse Calculator Enter semi-axes or full axes to get the exact area plus a high-accuracy circumference. Ellipsoid Volume Calculator Exact ellipsoid volume from three semi-axes, plus surface area with its accuracy stated. Equivalent Fractions Calculator List fractions equal to yours, find the simplest form, and test two for equivalence. Exam Countdown Timer A live-ticking countdown to your exam with real study-days remaining and milestones. Exponent Calculator Raise any base to any power, including zero, negative and fractional exponents, with the working shown. Factorial Calculator Compute n! exactly (BigInt for large n), plus nPr permutations and nCr combinations. Factoring Trinomials Calculator Factor ax2 + bx + c into two binomials with every factor pair tested shown. Fibonacci Calculator Find any Fibonacci number exactly with BigInt, list the sequence, and see the ratio. Final Grade Calculator Find the exact final exam score you need to hit your target course grade. Five Number Summary Calculator Get the minimum, Q1, median, Q3 and maximum, drawn as a box plot you can read. Fraction Calculator Add, subtract, multiply, or divide two fractions with simplified, mixed, and decimal results. Geometric Mean Calculator The right average when your numbers multiply rather than add, with the working shown. Grade Curve Calculator Apply flat, square-root, top-score, or target-mean curves to a class and compare before/after. Harmonic Mean Calculator The correct average for speeds, rates and ratios, with the reciprocal working shown. Hemisphere Volume Calculator Hemisphere volume, curved area and true total surface area including the flat face. Hexagon Calculator Solve a regular hexagon from the side, the across-flats width or the across-corners width. Interquartile Range Calculator Calculate the IQR and apply the 1.5 times IQR rule to flag outliers in your data. Interval Notation Calculator Convert an inequality to interval notation or read an interval back as an inequality. LCM & GCF Calculator Find LCM and GCF/HCF of 2+ numbers with prime-factorization and Euclidean algorithm steps. Law of Cosines Calculator Solve a triangle from three sides or two sides and the included angle. Law of Sines Calculator Solve AAS, ASA and SSA triangles, including both answers in the ambiguous case. Linear Regression Calculator Fit a least-squares line and get slope, intercept, r, r-squared and the standard error. Logarithm Calculator Find the logarithm of any number in any base, with natural, common and binary logs shown together. Long Division Calculator Divide any two numbers and see the full long division layout, not just the answer. MLA Citation Generator Generate a correctly formatted MLA 9th edition Works Cited entry and in-text citation. Margin of Error Calculator Calculate the margin of error for a survey result and the sample size a tighter one needs. Mean Median Mode Calculator Find the mean, median, mode, range, and sorted order of any number list instantly. Mixed Number Calculator Convert between mixed numbers, improper fractions, and decimals in both directions. Modulo Calculator Calculate a mod n with negative operands handled under all three conventions. Multiplying Fractions Calculator Multiply fractions and mixed numbers with cross-cancelling and the full working shown. Normal Distribution Calculator Find the area under a normal curve below, above or between values, plus the inverse. Octagon Calculator Solve a regular octagon from the side length, either width across the shape, or the apothem. P-Value Calculator Convert a z, t, chi-square or F statistic into an exact p-value and critical value. Pentagon Calculator Solve a regular pentagon from the side, apothem, circumradius, diagonal or overall height. Percent Error Calculator Compare an experimental measurement against the true value and see the error in full. Percentage Change Calculator Work out the percentage increase or decrease between two values, and the change needed to reverse it. Percentile Calculator Find the value at any percentile or the percentile rank of a value, plus quartiles and IQR. Perimeter Calculator Find the distance round a rectangle, square, triangle, circle, ellipse or regular polygon. Poisson Distribution Calculator Work out Poisson probabilities for a given rate, including both cumulative tails. Polygon Calculator Solve any regular polygon from one measurement, or an irregular outline from its corners. Polynomial Division Calculator Divide one polynomial by another and see the full long division layout at each stage. Prime Factorization Calculator Break any whole number into prime factors with a factor tree and exponent form. Prime Number Checker Test if a number is prime, see its prime factorization, and list primes in a range. Probability Calculator Calculate single-event, complement, independent and/or, conditional probability, and odds conversions. Pyramid Volume Calculator Volume, slant height and surface area for square, rectangular and polygon pyramids. Pythagorean Theorem Calculator Solve for any missing right-triangle side, verify triples, and get area, perimeter, and angles. Quadratic Equation Solver Solve ax²+bx+c=0 with discriminant, real/complex roots, vertex, and full step-by-step working. Quartile Calculator Find Q1, Q2 and Q3 and compare the five quartile methods that disagree with each other. Ratio Calculator Simplify a ratio, solve a proportion, scale a ratio, or convert it to a fraction/percentage. Rectangle Area Calculator Enter a length and a width in any unit and get area, perimeter, diagonal and aspect ratio. Rectangular Prism Calculator Volume, surface area and space diagonal of any box shape, plus capacity in litres. Reference Angle Calculator Reduce any angle to its acute reference angle and see the quadrant sign rule. Relative Frequency Calculator Turn raw counts into relative frequencies, percentages and a cumulative distribution. Remainder Calculator Get the remainder and whole quotient for any division, with the check shown in full. Root Mean Square Calculator Enter any set of values and get the RMS with every squared term written out. Rounding Calculator Round any number three different ways and see how the tie-breaking rules disagree. Scientific Calculator Full scientific calculator: trig, logs, powers, roots, factorials, and memory, right in your browser. Scientific Notation Converter Convert numbers between standard, scientific, E-notation, and engineering notation. Sector Area Calculator Enter a radius and an angle to get sector area, arc length, chord and segment area. Semester Grade Calculator See your weighted running semester grade and what score you need on what's left. Significant Figures Calculator Count sig figs, round to N sig figs, and do sig-fig-correct addition, subtraction, multiplication, and division. Simplify Fractions Calculator Reduce any fraction to lowest terms with the greatest common divisor shown in full. Slope Calculator Find slope, y-intercept, distance, midpoint, and the line equation from two points, with steps. Sphere Volume Calculator Find the volume and surface area of a sphere from its radius, diameter, surface area or volume. Square Root Calculator Find the square root of any number as a decimal and as an exact simplified radical form. Standard Deviation Calculator Get sample and population standard deviation, variance, and a full step-by-step working table. Study Time Planner Turn your exam list into a daily study schedule based on difficulty and confidence. Surface Area Calculator Total and lateral surface area for a cube, box, cylinder, cone, sphere or pyramid. System of Equations Calculator Solve two or three simultaneous linear equations with the full elimination working. T-Test Calculator Run one-sample, two-sample or paired t-tests on your data with exact p-values and effect size. Tetrahedron Volume Calculator Regular tetrahedron volume, surface area and height from an edge, volume or area. Torus Volume Calculator Torus volume and surface area from two radii or from inner and outer diameters. Trapezoid Calculator Work out the area, perimeter, height and midsegment of a trapezoid from what you have. Triangle Area Calculator Find the area of any triangle from a base and height, three sides, or two sides and an angle. Triangular Prism Calculator Volume, base area, lateral area and total surface area of a triangular prism, from three sides. Trigonometric Functions Calculator Find sin, cos, tan, csc, sec and cot for any angle in degrees or radians. Unit Circle Calculator Get unit circle coordinates, all six functions and quadrant signs for any angle. Variance Calculator Calculate sample or population variance, standard deviation and sum of squares from your data. Weighted Average Calculator Work out a weighted mean when some numbers count for more than others. Weighted Grade Calculator Enter category weights and scores to instantly see your weighted overall course grade. Words Per Page Calculator Convert word counts to pages (or pages to words) by font, size, spacing, and margins. Z-Score Calculator Turn any value into a z-score and read its exact percentile and one- or two-tailed p-value. 🎓 GPA Calculator Add courses with letter grades and credit hours to instantly calculate your weighted GPA.